Illuminated graphophone loudspeaker



Sept. 21, 1937. E. E. DEMETRIUS ILLUMINAT-ED GRAPHOPHONE LOUDSPEAKER '2 Sheets-Sheet 1 Original Filed Feb. 28, 1935 zirz'as Edward Fem 3 .am %w P 1937. E. E. DEMETRIUS I 2,093,957

ILLUMINATED GRAPHOPHONE LOUDSPEAKER Original Filed Feb. 28, 1955 2 Sheets-Sheet 2 Patented Sept. 21, 1937 UNITED STATES ILLUMINATED GRAPHOPHONE LOUD SPEAKER Edward E. Demetrius, Cross Roads P. 0., Jamaica,

British West Indies Application February 28, 1935, Serial No. 8,760

Renewed February 18, 1937 5 Claims.

This invention relates to a graphophone and generally aims to provide a novel construction which will dispense with the necessity of providing a sound chamber within a casing 01 sup- 5 port for the turntable.

More specifically, it is aimed to provide a novel construction wherein the diaphragm associated with the needle or stylus is operable within a novel amplifier or loudspeaker construction.

It is further aimed to provide a novel construction wherein the loudspeaker construction is illuminated under the control of a manual switch and a switch which operates automatically stops at the end of the playing of a record.

The more specific objects and advantages will become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiment.

In said drawings:-

Figure 1 is a View illustrating my improvements in plan, the cover of the casing or support being in open position;

Figure 2 is a side elevation of the amplifier or loud speaker construction alone;

Figure 3 is an elevation of one end of the device of Figure 2;

Figure 4 is an elevation of the opposite end-of said device of Figure 2;

Figure 5 is a sectional View taken on the line 5-5 of Figure 3;

Figure 6 is a sectional view taken on the line 66 of Figure 3;

Figure '7 is a cross sectional view taken on the line 'l'! of Figure 4;

Figure 8 is an end elevation of a modified form of amplifier, and

Figure 9 is a vertical sectional view taken on the line 9-9 of Figure 8.

Referring specifically to the drawings, the parts constituting the graphophone are mounted by and carried, for instance, in a casing or receptacle having a section I0 and a cover section I I hinged thereto as at l2. A handle i3 is provided on the section l0.

On section It), a turntable I4 is rotatably mounted by a shaft or spindle l5 adapted to be driven in any conventional way as by a spring motor (not shown) and adapted to be Wound periodically by a crank it. Conventional speed regulating means for the turntable I4 is shown at H.

A stylus or needle I8 is adapted to traverse or follow the sound grooves of the record placed upon the turntable l4, and it is held removably in a holder l9, by means of a set screw. 20. An arm 2| extends from the holder so that the vibration imparted to the stylus will be transmitted in the usual manner to a conventional diaphragm 22. The outer edge of the diaphragm 22 is fase tened to one end of a hollow amplifier body 23 preferably of horn-shape as shown, such body preferably being transparent or translucent and made, for instance, of paper, pasteboard, oiled paper, or any of the materials from which loud speaker cones are usuallyv made. The joint"between the edges of diaphragm 22 and, horn 23 may be effected by an adhesive .orin an'y desired manner.

Said amplifier body or, horn 23 is carried by a cage generally designated 24 and which consists of a spherical cup, or portion 25 from which an integral plate 26 depends, and to which the holder l9 may be fastened by screws 21, with lock washers or the like 28 interposed. Preferably integral with the cup-shaped portion 25"a're arms 28 of any desired number which are outwardly of the amplifier body 23 and engage the exterior thereof. I I

At the larger end of the amplifier body 25, it has an outwardly extending flange 30 against the inner and outer sides of which metallic rings 3| and .32 are disposed through which bolts 33 are passed which also pass through outwardly extending lugs '34 on the arms 28', on one side of which lugs, nuts 35 engage the bolts 33 and spacing elements 36 engage the other side. Said bolts 33 also passthrough flanges 31 of a metallic cap 38, perforated as at 39 and through a washer 4B of felt or the like, interposed between the cap 38 and ring 30.

Integral with the spherical portion 25 is a tubular member M which telescopes into one end of a hollow arm 42, so as .to be capable of turning therein and yet remaining in dilferent] positions through the friction action. Arm 42 clamps the usual tone arm and it is pivoted or swiveled on a vertical axis as at 43 to provide the necessary movement occasioned by traveling of the stylus IS in the sound grooves of the record. Section I0 includes a receptacle ID in which the reproducer amplifier may be placed when not in use to enable closing of cover ll.

As a result of the construction described, the sounds produced at the diaphragm 22 are amplified by the loudspeaker or horn body or the like 23, being emitted through the perforations 39, which feature enables me to dispense with a sound chamber beneath the turntable, and a sound arm or tone arm corresponding thereto.

It will be realized that the cage 24 is essentially made in a single piece, for instance, from aluminum.

Graphophones are often used where a source of light is inaccessible, and to this end I have arranged for illumination in the present invention, utilizing the horn or amplifier body 23 in View of its transparency or translucency, as a shade. For instance, designates an electric bulb removably carried in a conventional manner in a socket 46, such bulb having one side grounded to the cap 38 and through the various metallic parts to the arm 42. The other side has a contact 41 releasably engaging the same and carried by and insulated from the socket 46. A conductor 28 is connected to contact 41, leading from one terminal 49 of a source of electric energy such as one or more dry cells 50. A conductor 5| leads from the other terminal of the source 50 to a manually operable switch 52 from which a conductor 53 leads to a contact 54. Adjacent contact 54 is a contact 55 from which a conductor 56 leads to a pivot means 43 of the arm 42, thus grounding one side of the battery. A conventional, automatic stop device for the turntable I4 is shown at 51 which has electrically connected contacts 58 and 59 thereon.

With the switch 52 closed and the record playing contacts 54 and 58 are engaged, while contacts 55 and 59 are engaged, thus closing an electric circuit through the lamp 45. If it is desired to extinguish the lamp, or if it is unnecessary, as in the daytime, the switch 52 is moved manually to off position. On the other hand, if

the switch 52 is on, and the contacts are engaged as previously mentioned, the bulb 45 will remain illuminated until the automatic stop device for the platform, designated 51, operates since, such automatic stop device in moving to the off position or stopping position, moves the contacts 58 and 59 out of engagement with those at 54 and 55.

Modified forms of the invention may be provided, for instance, that shown in Figures 8 and 9. In this form, the diaphragm is shown at 22' with an arm 2| connected thereto and subject to the vibration of a stylus l8 mounted by a holder [9 carried by a spherical body 25' having a tubular portion 4| extending therefrom whereby it may be connected to an arm 42, like the portion 4|. A metallic cap 38' is secured by screws 39' to the spherical body 25', between which bodies the diaphragm 22 is clamped. The cap 38 is metallic and is perforated as at 40' for emission of sound.

Various changes may be resorted to provided they fall within the spirit and scope of the invention.

I claim as my invention:-

1. In a graphophone, means to reproduce sounds from a record including a diaphragm, an

amplifier directly receiving sound from the diaphragm, a cage mounting the amplifier, stylus holding means mounted by the cage having an arm rigidly connected to the diaphragm, arms on said cage, means securing the amplifier to said arms, and a perforated cap at the larger end of the amplifier clamped to the amplifier by the second-mentioned means.

2. In a graphophone, means to reproduce sounds from a record including a diaphragm, an amplifier directly receiving sound from the diaphragm, a cage mounting the amplifier, said cage having a cup-shaped element having its concavity facing the rear of the diaphragm, a stylus-holding means mounted by the cup-shaped member having an arm extending through the cup-shaped member and connected to the diaphragm, and means securing the amplifier to the cage.

3. In a graphophone, means to reproduce sounds from a record including a diaphragm, an amplifier directly receiving sound from the diaphragm, a cage mounting the amplifier, said cage having a cup-shaped element having its concavity facing the rear of the diaphragm, a stylus-holding means mounted by the cup-shaped member having an arm extending through the cup-shaped member and connected to the diaphragm, means securing the amplifier to the cage, and means extending from the cup-shaped member adapted for swivel attachment to a pivoted arm.

4. A graphophone, means to reproduce sounds from a record including a diaphragm, an amplifier directly receiving sound from the diaphragm, a cage mounting the amplifier, stylusholding means, said cage including a cup-shaped member having its concavity facing the rear of said diaphragm, a plate on said cup-shaped member, said stylus-holding means being mounted by said plate and having an arm extending through the cup-shaped member and connected to the diaphragm, arms on said cage extending forwardly from said cup-shaped member, and said arms mounting said amplifier.

5. A graphophone, means to reproduce sounds from a record including a diaphragm, an amplifier directly receiving sound from the diaphragm, a cage mounting the amplifier, stylusholding means, said cage including a cup-shaped member having its concavity facing the rear of said diaphragm, a plate on said cup-shaped member, said stylus-holding means being mounted by said plate and having an arm extending through the cup-shaped member and connected to the diaphragm, arms on said cage extending forwardlyfrom said cup-shaped member, means securing the amplifier to said arms, and a perforated cap at the larger end of the amplifier clamped tothe amplifier by the secondmentioned means.

EDWARD E. DEMETRIUS.

or Le.) 

